Thread: 2 errors in my code

i got a project due tomorrow dealing with inheritence and i seem to have hit a brick wall. the errors are:

c:\documents and settings\johnnyg\my documents\visual studio 2005\projects\project 8\project 8\Cube.h(4) : error C2504: 'Rectangle' : base class undefined
.\Cube.cpp(5) : error C2511: 'Cube::Cube(void)' : overloaded member function not found in 'Cube'
c:\documents and settings\johnnyg\my documents\visual studio 2005\projects\project 8\project 8\Cube.h(3) : see declaration of 'Cube'

rectangle is a declared class

if needed here it is:

Code:

class Rectangle
{
public:
	Rectangle(double=0.0,double=0.0);
	double getWidth();
	double getLength();
	double getArea();
private:
	double width;
	double length;
};

the cube class is here:

Code:

class Cube : public Rectangle
{

	public:
		Cube(double=0.0);
		double getHeight();
		double getVolume();
	private:
		double height;
		double volume;
};

and the cpp where the 2nd error occurs

Code:

#include "Cube.h"


Cube::Cube(double height=0.0)
{

}

double Cube::getHeight()
{
	return height;
}//height

double Cube::getVolume()
{
	double volume;
	volume=height*height*height;
	return volume;
}//getvolume

if anyone can help would really appreciate it thanks in advance